Total War: Warhammer hasn't been out all that long all told, but it seems that Creative Assembly are going to be supporting the game fairly regularly.
The first bit of DLC has now been announced as Call of the Beastment, bringing the primal enemies into the fold. It is coming soon too. The update will be here this month, launching July 28th. How the race will play isn't clear yet, but the trailer makes it pretty clear that they don't have much love for man.
Hopefully we will continue to get frequent updates for the game, and it grows incredibly fast. More choise of race, the better I say.